CA2317692A1 - Pyrogenically produced aluminium oxide - Google Patents
Pyrogenically produced aluminium oxide Download PDFInfo
- Publication number
- CA2317692A1 CA2317692A1 CA002317692A CA2317692A CA2317692A1 CA 2317692 A1 CA2317692 A1 CA 2317692A1 CA 002317692 A CA002317692 A CA 002317692A CA 2317692 A CA2317692 A CA 2317692A CA 2317692 A1 CA2317692 A1 CA 2317692A1
- Authority
- CA
- Canada
- Prior art keywords
- good
- aluminium oxide
- surface area
- industry
- pyrogenically produced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/30—Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
- C01F7/302—Hydrolysis or oxidation of gaseous aluminium compounds in the gaseous phase
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/11—Powder tap density
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/90—Other properties not specified above
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
- Y10T428/257—Iron oxide or aluminum oxide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
Abstract
Pyrogenically produced aluminium oxide, in which the BET
specific surface area is greater than 115 m2/g and the Sears index is over 8 ml/2g and the dibutyl phthalate absorption as a powder measured with a 16 g weighed portion is not measurable, is produced by means of flame oxidation or preferably flame hydrolysis, whereby a vaporisable aluminium compound is used as starting material.
The aluminium oxide can be used as an ink-absorbing substance in inkjet media and also as a filler, as a substrate, as a catalytically active substance, as a starting material for the production of dispersions, as a polishing material (CMP applications), as a ceramic raw material, in the electronics industry, in the cosmetics industry, as an additive in the silicone and rubber industry, to adjust the rheology of liquid systems, as a heat stabiliser, in the paint industry.
specific surface area is greater than 115 m2/g and the Sears index is over 8 ml/2g and the dibutyl phthalate absorption as a powder measured with a 16 g weighed portion is not measurable, is produced by means of flame oxidation or preferably flame hydrolysis, whereby a vaporisable aluminium compound is used as starting material.
The aluminium oxide can be used as an ink-absorbing substance in inkjet media and also as a filler, as a substrate, as a catalytically active substance, as a starting material for the production of dispersions, as a polishing material (CMP applications), as a ceramic raw material, in the electronics industry, in the cosmetics industry, as an additive in the silicone and rubber industry, to adjust the rheology of liquid systems, as a heat stabiliser, in the paint industry.
Description
Pyrogenically produced aluminium oxide The invention concerns a pyrogenically produced aluminium oxide, a method for its production and its use.
Applications in the paper industry call for readily dispersible fillers which absorb ink rapidly when used in inkjet paper or inkjet films and which help to give colours a high brilliance. The present invention concerns a specially produced aluminium oxide which, by virtue of its properties in corresponding coating slip formulations, is capable of reproducing inks applied by an inkjet printer onto these media containing this special aluminium oxide with very high brilliance and colour fidelity.
It also concerns the application of this aluminium oxide in the manufacture of ink-receiving layers such as are conventional in inkjet media (e. g. paper, films, fabric, etc.).
The invention provides a high surface area, pyrogenically produced aluminium oxide, characterised in that the BET
specific surface area is greater than 115 mz/g, and the Sears index is over 8 ml/2g.
In an embodiment of the invention, the aluminium oxide is characterised in that the dibutyl phthalate absorption by the powder measured with a 16 g weighed portion is not measurable (no end-point detection).
The pyrogenically produced aluminium oxide according to the invention can be produced by means of flame oxidation or preferably flame hydrolysis, whereby a vaporisable aluminium compound, preferably chloride, is used as starting material.
Applications in the paper industry call for readily dispersible fillers which absorb ink rapidly when used in inkjet paper or inkjet films and which help to give colours a high brilliance. The present invention concerns a specially produced aluminium oxide which, by virtue of its properties in corresponding coating slip formulations, is capable of reproducing inks applied by an inkjet printer onto these media containing this special aluminium oxide with very high brilliance and colour fidelity.
It also concerns the application of this aluminium oxide in the manufacture of ink-receiving layers such as are conventional in inkjet media (e. g. paper, films, fabric, etc.).
The invention provides a high surface area, pyrogenically produced aluminium oxide, characterised in that the BET
specific surface area is greater than 115 mz/g, and the Sears index is over 8 ml/2g.
In an embodiment of the invention, the aluminium oxide is characterised in that the dibutyl phthalate absorption by the powder measured with a 16 g weighed portion is not measurable (no end-point detection).
The pyrogenically produced aluminium oxide according to the invention can be produced by means of flame oxidation or preferably flame hydrolysis, whereby a vaporisable aluminium compound, preferably chloride, is used as starting material.
The invention also provides the use of the aluminium oxide according to the invention as an ink-absorbing substance in inkjet media.
The invention also provides the use of the high surface area aluminium oxide according to the invention as a filler, as a substrate, as a catalytically active substance, as a starting material for the production of dispersions, as a polishing material (CMP applications), as a ceramic raw material, in the electronics industry, in the cosmetics industry, as an additive in the silicone and rubber industry, to adjust the rheology of liquid systems, as a heat stabiliser, in the paint industry.
The pyrogenically produced aluminium oxide according to the invention as an ink-absorbing substance displays the following properties:
Good optical density and dot resolution, high ink absorption, rapid ink drying time, no bleeding (running together of inks), good water resistance after drying, no colour shifts, no breakdown of inks after extended periods.
In comparison to known commercially available products (Aluminiumoxid C and Aerosil MOX 170, both from Degussa-Hiils AG), the aluminium oxide according to the invention exhibits very good properties for the manufacture of inkjet receiving layers, both alone and in combination with other fillers. It is characterised by enhanced brilliance and depth of colour. These properties are of particular benefit in ink-receiving layers that are used for photographic quality reproduction. Vfleather resistance to water and light is also improved, which is advantageous for outdoor applications.
Example 1 320 kg/h of previously vaporised aluminium trichloride (A1C13) are burned together with 100 Nm3/h hydrogen and 450 Nm3/h air in a burner of a known design.
After the flame reaction the fine-particle high surface area aluminium oxide is separated in a filter or cyclone from the hydrochloric acid gases generated at the same time, whereby any HC1 traces still adhering are then removed by treatment with moist air at elevated temperature.
The high surface area pyrogenic aluminium oxide produced exhibits the physicochemical properties indicated in Table 1. Data for the commercially available pyrogenic aluminium oxide produced by Degussa-Hiils AG in Frankfurt am Main is also included in Table 1 for the purposes of comparison.
(Trade name Aluminiumoxid C).
Table 1 Unit Sigh surface area Aluminium-aluminium oxide oxid C
according to the invention Alu 130 BET m' / g 121 10 0 specific surface area Sears index ml/2g 9.38 7.05 (pH 4 to 9 ) pH 4~ aqueous 4.93 4.5 dispersion Loss on drying wt.~ 3.3 3.0 Bulk density g/1 55 4g Compacted bulk g/1 63 57 density DBP absorption wt.~ not measurable , 231 no end point can be determined.
DBP: dibutyl phthalate Measurement of the Sears index is described in EP 0 717 008.
The invention also provides the use of the high surface area aluminium oxide according to the invention as a filler, as a substrate, as a catalytically active substance, as a starting material for the production of dispersions, as a polishing material (CMP applications), as a ceramic raw material, in the electronics industry, in the cosmetics industry, as an additive in the silicone and rubber industry, to adjust the rheology of liquid systems, as a heat stabiliser, in the paint industry.
The pyrogenically produced aluminium oxide according to the invention as an ink-absorbing substance displays the following properties:
Good optical density and dot resolution, high ink absorption, rapid ink drying time, no bleeding (running together of inks), good water resistance after drying, no colour shifts, no breakdown of inks after extended periods.
In comparison to known commercially available products (Aluminiumoxid C and Aerosil MOX 170, both from Degussa-Hiils AG), the aluminium oxide according to the invention exhibits very good properties for the manufacture of inkjet receiving layers, both alone and in combination with other fillers. It is characterised by enhanced brilliance and depth of colour. These properties are of particular benefit in ink-receiving layers that are used for photographic quality reproduction. Vfleather resistance to water and light is also improved, which is advantageous for outdoor applications.
Example 1 320 kg/h of previously vaporised aluminium trichloride (A1C13) are burned together with 100 Nm3/h hydrogen and 450 Nm3/h air in a burner of a known design.
After the flame reaction the fine-particle high surface area aluminium oxide is separated in a filter or cyclone from the hydrochloric acid gases generated at the same time, whereby any HC1 traces still adhering are then removed by treatment with moist air at elevated temperature.
The high surface area pyrogenic aluminium oxide produced exhibits the physicochemical properties indicated in Table 1. Data for the commercially available pyrogenic aluminium oxide produced by Degussa-Hiils AG in Frankfurt am Main is also included in Table 1 for the purposes of comparison.
(Trade name Aluminiumoxid C).
Table 1 Unit Sigh surface area Aluminium-aluminium oxide oxid C
according to the invention Alu 130 BET m' / g 121 10 0 specific surface area Sears index ml/2g 9.38 7.05 (pH 4 to 9 ) pH 4~ aqueous 4.93 4.5 dispersion Loss on drying wt.~ 3.3 3.0 Bulk density g/1 55 4g Compacted bulk g/1 63 57 density DBP absorption wt.~ not measurable , 231 no end point can be determined.
DBP: dibutyl phthalate Measurement of the Sears index is described in EP 0 717 008.
Example 2 Manufacture of the coating slip and coating:
30 parts by weight of polyvinyl alcohol Mowiol 28-99 (Clariant), 80 parts by weight of Sipernat 310 (precipitated silicic acid, Degussa-Hiils AG) and in each case 20 parts by weight of the pyrogenically produced oxides described above are used. The solids content is adjusted to 18 ~. This aqueous dispersion is stirred for 30 min at 3000 rpm with a high-speed mixer. This coating slip is applied to a 70 g/m2 base paper by means of a profiled doctor bar. The coating slip is dried with hot air. The rate of application in the dry state is 10 g/mz.
Results Aerosil MOX 170 Aluminiumoxid Alu 130 C
Brilliance good good-very good very good Weather satisfactory good good-very good resistance Example 3 Manufacture of the coating slip:
35 parts by weight of polyvinyl alcohol Mowiol 28-99 (Clariant) and in each case 100 parts by weight of the pyrogenically produced oxides described above are used. The solids content is adjusted to 15 $. This dispersion is homogenised. This coating slip is applied to a 100 micrometer thick polyester film by means of a profiled doctor bar. The coating slip is dried with hot air. The wet film thickness is 120 micrometers.
Results Aerosil MOX 170 Alu C Alu 130 Adhesion to adequate-good good-very good film satisfactory Brilliance satisfactory good good-very good Weather satisfactory good good-very good resistance Ink absorption good- good very good satisfactory Gloss good- good-very good very good satisfactory Example 4 Manufacture of the coating slip:
30 parts by weight of polyvinyl alcohol Mowiol 28-99 (Clariant), 80 parts by weight of Sipernat 310 (precipitated silicic acid, Degussa-Hiils AG) and in each case 20 parts by weight of the pyrogenically produced oxides described above are used. The solids content is adjusted to 18 ~. This aqueous dispersion is stirred for 30 min at 3000 rpm with a high-speed mixer. This coating slip is applied to a 70 g/m2 base paper by means of a profiled doctor bar. The coating slip is dried with hot air. The rate of application in the dry state is 10 g/mz.
Results Aerosil MOX 170 Aluminiumoxid Alu 130 C
Brilliance good good-very good very good Weather satisfactory good good-very good resistance Example 3 Manufacture of the coating slip:
35 parts by weight of polyvinyl alcohol Mowiol 28-99 (Clariant) and in each case 100 parts by weight of the pyrogenically produced oxides described above are used. The solids content is adjusted to 15 $. This dispersion is homogenised. This coating slip is applied to a 100 micrometer thick polyester film by means of a profiled doctor bar. The coating slip is dried with hot air. The wet film thickness is 120 micrometers.
Results Aerosil MOX 170 Alu C Alu 130 Adhesion to adequate-good good-very good film satisfactory Brilliance satisfactory good good-very good Weather satisfactory good good-very good resistance Ink absorption good- good very good satisfactory Gloss good- good-very good very good satisfactory Example 4 Manufacture of the coating slip:
5 70 parts by weight of polyvinyl alcohol Mowiol 5-88 (Clariant), 20 parts by weight of PVP/VA W-735 (polyvinyl pyrrolidone-polyvinyl acetate copolymer, ISP), 10 parts of polyvinyl pyrrolidone K-30 (ISP) and in each case 50 parts by weight of the pyrogenically produced oxides described above are used.
The solids content is adjusted to 20 ~. The coating slip is applied by means of a profiled doctor bar to a 100 micrometer thick polyester film in a wet film thickness of 80 micrometers. The coating slip is dried with hot air.
The solids content is adjusted to 20 ~. The coating slip is applied by means of a profiled doctor bar to a 100 micrometer thick polyester film in a wet film thickness of 80 micrometers. The coating slip is dried with hot air.
Results Aerosil MOX 170 Alu C Alu 130 Brilliance good good-ve ry good very good Weather satisfactory- good good-very good resistance good Transparency satisfactory good good-very good Gloss satisfactory- good-ve ry good very good good These results illustrate the application-related advantages of the aluminium oxide Alu 130 according to the invention.
Example 5 For the purposes of comparison, Aluminiumoxid C and MOX 170 (both Degussa-Hills AG Frankfurt) were used in addition to the high surface area aluminium oxide 130 according to the invention.
Manufacture of the coating slip and coating:
Solution A is a 10 percent (relative to PVA) aqueous solution of polyvinyl alcohol (solid, abbreviation PVA) Mowiol 28-99 from Clariant.
Distilled water is added to this solution to form a solution B. Sipernat 310 (precipitated silicic acid, Degussa-Hills AG) and each of the pyrogenically produced oxides are added to this solution B to form the coating slip C. This coating slip exhibits a mass ratio of 80 parts Sipernat 310 to 20 parts pyrogenic oxide to 30 parts PVA, relative to the solids. The total solids content is 18 The coating slip C is dispersed for 30 minutes at 3000 rpm in a high-speed mixer. The coating slip is then applied to a 70 g/m2 base paper by means of a profiled doctor bar and dried with hot air. The rate of application in the dry state is 10 g/ma.
The printing tests are performed on an Epson Stylus Colour 800 at maximum resolution (1440 * 720 dpi).
Results Aerosil MOX 170 Alu C high surface area aluminium oxide according to the invention Colour good good-very very good intensity good Colour satisfactory good good-very good stability Example 6 Coating slip formulation For the purposes of comparison, Aluminiumoxid C and MOX 170 (both Degussa-Hills AG Frankfurt) are used as additional oxides in addition to the high surface area aluminium oxide 130 according to the invention.
An aqueous dispersion is produced from these three different pyrogenic oxides using a rotor-stator system (Ultra-Turrax) for a dispersion period of 30 minutes in a double-walled vessel (with water cooling). A 25 percent dispersion (relative to the solid) (w = 0.25) is produced containing a proportion by weight of 0.5 ~ acetic acid.
Example 5 For the purposes of comparison, Aluminiumoxid C and MOX 170 (both Degussa-Hills AG Frankfurt) were used in addition to the high surface area aluminium oxide 130 according to the invention.
Manufacture of the coating slip and coating:
Solution A is a 10 percent (relative to PVA) aqueous solution of polyvinyl alcohol (solid, abbreviation PVA) Mowiol 28-99 from Clariant.
Distilled water is added to this solution to form a solution B. Sipernat 310 (precipitated silicic acid, Degussa-Hills AG) and each of the pyrogenically produced oxides are added to this solution B to form the coating slip C. This coating slip exhibits a mass ratio of 80 parts Sipernat 310 to 20 parts pyrogenic oxide to 30 parts PVA, relative to the solids. The total solids content is 18 The coating slip C is dispersed for 30 minutes at 3000 rpm in a high-speed mixer. The coating slip is then applied to a 70 g/m2 base paper by means of a profiled doctor bar and dried with hot air. The rate of application in the dry state is 10 g/ma.
The printing tests are performed on an Epson Stylus Colour 800 at maximum resolution (1440 * 720 dpi).
Results Aerosil MOX 170 Alu C high surface area aluminium oxide according to the invention Colour good good-very very good intensity good Colour satisfactory good good-very good stability Example 6 Coating slip formulation For the purposes of comparison, Aluminiumoxid C and MOX 170 (both Degussa-Hills AG Frankfurt) are used as additional oxides in addition to the high surface area aluminium oxide 130 according to the invention.
An aqueous dispersion is produced from these three different pyrogenic oxides using a rotor-stator system (Ultra-Turrax) for a dispersion period of 30 minutes in a double-walled vessel (with water cooling). A 25 percent dispersion (relative to the solid) (w = 0.25) is produced containing a proportion by weight of 0.5 ~ acetic acid.
Manufacture of the coating slip:
Solution A is an 8 percent (relative to PVA) aqueous solution of polyvinyl alcohol (solid, abbreviation PVA) Mowiol 40-88 from Clariant.
This solution A is diluted with distilled water to produce a solution B. Each of the various metal oxide dispersions is added to solution B to form a coating slip C. The coating slip C exhibits a mass ratio of 100 parts pyrogenic oxide to 25 parts PVA, relative to the solid. The total solids content is 15 ~. This coating slip is applied by means of a profiled doctor bar to a 100 micrometer thick polyester film and dried with hot air. The wet film thickness is 120 micrometers.
It was not possible to manufacture an adhesive coating using Aerosil MOX 170.
For this mixed oxide the proportion had to be increased to a ratio of 100 parts Aerosil to 40 parts PVA, relative to the solids ratio.
Solution A is an 8 percent (relative to PVA) aqueous solution of polyvinyl alcohol (solid, abbreviation PVA) Mowiol 40-88 from Clariant.
This solution A is diluted with distilled water to produce a solution B. Each of the various metal oxide dispersions is added to solution B to form a coating slip C. The coating slip C exhibits a mass ratio of 100 parts pyrogenic oxide to 25 parts PVA, relative to the solid. The total solids content is 15 ~. This coating slip is applied by means of a profiled doctor bar to a 100 micrometer thick polyester film and dried with hot air. The wet film thickness is 120 micrometers.
It was not possible to manufacture an adhesive coating using Aerosil MOX 170.
For this mixed oxide the proportion had to be increased to a ratio of 100 parts Aerosil to 40 parts PVA, relative to the solids ratio.
Results Aerosil MOX 170 Alu C High surface area aluminium oxide according to the invention Adhesion to adequate good good-very good film Brilliance satisfactory good-ver y good very good Colour satisfactory good-ve ry good very good stability Ink very good good good-very good absorption Gloss poor good-very good very good Example 7 Coating slip formulation For the purposes of comparison, Aluminiumoxid C and MOX 170 (both Degussa-Hills AG Frankfurt) were used as additional oxides in addition to the high surface area aluminium oxide 130 according to the invention.
Solution A is a 20 percent (relative to PVA) aqueous solution of polyvinyl alcohol (solid, abbreviation PVA) 4-88 from Clariant.
Solution B is a 50 percent (relative to the copolymer) aqueous solution of a copolymer of vinyl pyrrolidone and vinyl acetate (abbreviation PVP / VA) W 735 from ISP.
Solution C is a 20 percent (relative to PVP) aqueous solution of polyvinyl pyrrolidone (abbreviation PVP) K - 30 from ISP.
These three solutions are mixed in the above sequence and 5 in the following ratio (70 parts by weight PVA . 20 parts PVP / VA . 10 parts PVP, relative to the solid) and diluted with water so that a coating slip with a total solids content of 20 ~ is obtained by addition of 50 parts of each of the metal oxides. This dispersion is dispersed for 30 10 minutes at 10000 rpm in a suitable dispersion device such as an Ultra-Turrax from Janke & Kunkel with a rotor-stator system. The coating slip is applied by means of a profiled doctor bar to a 100 micrometer thick polyester film in a wet film thickness of 80 micrometers and dried with hot air.
Results Aerosil MOX Alu C high surface area 170 aluminium oxide according to the invention Brilliance good good-ve ry very good good Colour satisfactory good good-very good stability -good Transparency satisfactory good good-very good Gloss satisfactory good-ve ry very good -good good . 990148 FA / AL
Solution A is a 20 percent (relative to PVA) aqueous solution of polyvinyl alcohol (solid, abbreviation PVA) 4-88 from Clariant.
Solution B is a 50 percent (relative to the copolymer) aqueous solution of a copolymer of vinyl pyrrolidone and vinyl acetate (abbreviation PVP / VA) W 735 from ISP.
Solution C is a 20 percent (relative to PVP) aqueous solution of polyvinyl pyrrolidone (abbreviation PVP) K - 30 from ISP.
These three solutions are mixed in the above sequence and 5 in the following ratio (70 parts by weight PVA . 20 parts PVP / VA . 10 parts PVP, relative to the solid) and diluted with water so that a coating slip with a total solids content of 20 ~ is obtained by addition of 50 parts of each of the metal oxides. This dispersion is dispersed for 30 10 minutes at 10000 rpm in a suitable dispersion device such as an Ultra-Turrax from Janke & Kunkel with a rotor-stator system. The coating slip is applied by means of a profiled doctor bar to a 100 micrometer thick polyester film in a wet film thickness of 80 micrometers and dried with hot air.
Results Aerosil MOX Alu C high surface area 170 aluminium oxide according to the invention Brilliance good good-ve ry very good good Colour satisfactory good good-very good stability -good Transparency satisfactory good good-very good Gloss satisfactory good-ve ry very good -good good . 990148 FA / AL
Advantages:
In comparison to the commercially available products (Aluminiumoxid C and Aerosil MOX 170, both Degussa-Huls AG) the aluminium oxide according to the invention exhibits very good properties in the manufacture of inkjet receiving layers both alone and in combination with other fillers. It is characterised by enhanced brilliance and depth of colour. These properties are of particular benefit in ink-receiving layers that are used for photographic quality reproduction. It also demonstrates improved colour stability in the presence of water and light, which is advantageous for outdoor applications.
In comparison to the commercially available products (Aluminiumoxid C and Aerosil MOX 170, both Degussa-Huls AG) the aluminium oxide according to the invention exhibits very good properties in the manufacture of inkjet receiving layers both alone and in combination with other fillers. It is characterised by enhanced brilliance and depth of colour. These properties are of particular benefit in ink-receiving layers that are used for photographic quality reproduction. It also demonstrates improved colour stability in the presence of water and light, which is advantageous for outdoor applications.
Claims (5)
1. High surface area pyrogenically produced aluminium oxide, characterised in that the BET specific surface area is greater than 115 m2/g and the Sears index is over 8 ml/2g.
2. Pyrogenically produced aluminium oxide according to claim 1, characterised in that the dibutyl phthalate absorption of the powder measured with a 16 g weighed portion is not measurable (no end-point detection).
3. Pyrogenically produced aluminium oxide according to claims 1 and 2, characterised in that it is produced by means of flame oxidation or preferably flame hydrolysis, whereby a vaporisable aluminium compound, preferably chloride, is used as starting material.
4.Use of the high surface area aluminium oxide according to claim 1 as an ink-absorbing substance in inkjet media.
5. Use of the high surface area aluminium oxide according to claim 1 as a filler, as a substrate, as a catalytically active substance, as a starting material for the production of dispersions, as a polishing.
material (CMP applications), as a ceramic raw material, in the electronics industry, in the cosmetics industry, as an additive in the silicone and rubber industry, to adjust the rheology of liquid systems, as a heat stabiliser, in the paint industry.
material (CMP applications), as a ceramic raw material, in the electronics industry, in the cosmetics industry, as an additive in the silicone and rubber industry, to adjust the rheology of liquid systems, as a heat stabiliser, in the paint industry.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19943291.0 | 1999-09-10 | ||
| DE19943291A DE19943291A1 (en) | 1999-09-10 | 1999-09-10 | Pyrogenic alumina |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2317692A1 true CA2317692A1 (en) | 2001-03-10 |
Family
ID=7921478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002317692A Abandoned CA2317692A1 (en) | 1999-09-10 | 2000-09-07 | Pyrogenically produced aluminium oxide |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US6680109B1 (en) |
| EP (1) | EP1083151B1 (en) |
| JP (1) | JP3529712B2 (en) |
| CN (1) | CN1287974A (en) |
| AT (1) | ATE212320T1 (en) |
| BR (1) | BR0004058A (en) |
| CA (1) | CA2317692A1 (en) |
| DE (2) | DE19943291A1 (en) |
| DK (1) | DK1083151T3 (en) |
| ES (1) | ES2170743T3 (en) |
| IL (1) | IL138315A0 (en) |
| NO (1) | NO321445B1 (en) |
| PL (1) | PL342441A1 (en) |
| TW (1) | TWI232205B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7572854B2 (en) | 2001-10-25 | 2009-08-11 | Degussa Ag | Dispersion of aluminium oxide |
| US8241594B2 (en) | 2007-05-21 | 2012-08-14 | Orbite Aluminae Inc. | Processes for extracting aluminum and iron from aluminous ores |
| US9023301B2 (en) | 2012-01-10 | 2015-05-05 | Orbite Aluminae Inc. | Processes for treating red mud |
| US9150428B2 (en) | 2011-06-03 | 2015-10-06 | Orbite Aluminae Inc. | Methods for separating iron ions from aluminum ions |
| US9181603B2 (en) | 2012-03-29 | 2015-11-10 | Orbite Technologies Inc. | Processes for treating fly ashes |
| US9260767B2 (en) | 2011-03-18 | 2016-02-16 | Orbite Technologies Inc. | Processes for recovering rare earth elements from aluminum-bearing materials |
| US9290828B2 (en) | 2012-07-12 | 2016-03-22 | Orbite Technologies Inc. | Processes for preparing titanium oxide and various other products |
| US9353425B2 (en) | 2012-09-26 | 2016-05-31 | Orbite Technologies Inc. | Processes for preparing alumina and magnesium chloride by HCl leaching of various materials |
| US9382600B2 (en) | 2011-09-16 | 2016-07-05 | Orbite Technologies Inc. | Processes for preparing alumina and various other products |
| US9410227B2 (en) | 2011-05-04 | 2016-08-09 | Orbite Technologies Inc. | Processes for recovering rare earth elements from various ores |
| US9534274B2 (en) | 2012-11-14 | 2017-01-03 | Orbite Technologies Inc. | Methods for purifying aluminium ions |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE398208T1 (en) * | 1999-10-01 | 2008-07-15 | Cabot Corp | RECORDING MEDIUM |
| DE10124629A1 (en) | 2001-05-18 | 2002-11-28 | Degussa | Alumina dispersion |
| DE10138574A1 (en) | 2001-08-06 | 2003-02-27 | Degussa | Granules based on pyrogenically produced aluminum oxide, process for their production and their use |
| DE10149130A1 (en) * | 2001-10-05 | 2003-04-10 | Degussa | Flame hydrolytic alumina doped with divalent metal oxide is used in aqueous dispersion for chemical-mechanical polishing of metallic and nonmetallic surfaces, coating paper or producing special glass |
| EP1308422A1 (en) | 2001-10-30 | 2003-05-07 | Degussa AG | A method of producing glass of optical qualitiy |
| US20040126572A1 (en) * | 2002-09-20 | 2004-07-01 | Cabot Corporation | Zirconium-containing metal oxide dispersions for recording media with improved ozone resistance |
| US7442727B2 (en) | 2003-06-04 | 2008-10-28 | Degussa Ag | Pyrogenically prepared, surface modified aluminum oxide |
| US20050074473A1 (en) * | 2003-10-07 | 2005-04-07 | Cabot Corporation | Soft-focus cosmetic composition comprising fumed alumina |
| DE10360087A1 (en) | 2003-12-20 | 2005-07-21 | Degussa Ag | Flame hydrolysis produced, hochoberflächiges alumina powder |
| DE102004061700A1 (en) * | 2004-12-22 | 2006-07-06 | Degussa Ag | Alumina powder, dispersion and coating composition |
| DE102006007888A1 (en) * | 2006-02-21 | 2007-08-23 | Degussa Gmbh | Aqueous alumina dispersion for use in melamine resin formulation for making cured product e.g. laminate for furniture or flooring contains highly disperse alumina surface modified with amino- and/or hydroxy-substituted organophosphonic acid |
| JP4971371B2 (en) | 2006-02-28 | 2012-07-11 | エボニック デグサ コーポレーション | Colored paper and substrate coated to enhance printing performance |
| DE102006039269A1 (en) * | 2006-08-22 | 2008-02-28 | Evonik Degussa Gmbh | Dispersion of alumina, coating composition and ink receiving medium |
| US8029761B2 (en) | 2006-09-01 | 2011-10-04 | Cabot Corporation | Surface-treated metal oxide particles |
| CN101512070A (en) * | 2006-09-26 | 2009-08-19 | 赢创德固赛公司 | Multi-functional paper for enhanced printing performance |
| WO2008094928A1 (en) | 2007-01-29 | 2008-08-07 | Evonik Degussa Gmbh | Fumed metal oxides for investment casting |
| DE102007031635A1 (en) | 2007-07-06 | 2009-01-15 | Evonik Degussa Gmbh | Process for the preparation of metal oxide granules |
| DE102008044906A1 (en) * | 2008-08-29 | 2010-03-04 | Ibu-Tec Advanced Materials Ag | Process for the preparation of a finely divided powder material and such a powder material |
| EP2358637A1 (en) * | 2008-12-17 | 2011-08-24 | Evonik Degussa GmbH | Process for preparing an aluminium oxide powder having a high alpha-al2o3 content |
| JP6134548B2 (en) * | 2013-03-21 | 2017-05-24 | 株式会社トクヤマ | Spherical alumina particle powder and method for producing the same |
| CN106241845B (en) * | 2016-08-29 | 2017-12-22 | 何顺爱 | A kind of ultrapure ball-aluminium oxide powder preparation method |
| CN106629799B (en) * | 2016-10-25 | 2018-01-23 | 乌鲁木齐市三锐科技有限公司 | A kind of method of combustion synthesis alumina powder |
| KR20220004180A (en) | 2019-05-07 | 2022-01-11 | 에보니크 오퍼레이션즈 게엠베하 | Lithium-ion battery separator coated with surface-treated alumina |
| TW202135363A (en) | 2020-01-14 | 2021-09-16 | 德商贏創運營有限公司 | A protective layer for a metal electrode and lithium battery comprising the same |
| CN112079630A (en) * | 2020-09-28 | 2020-12-15 | 成都万士达瓷业有限公司 | Sintering process of Al2O3 ceramic substrate |
| EP4064386A1 (en) | 2021-03-24 | 2022-09-28 | Evonik Operations GmbH | Core-shell particles based on red lead for lead-acid batteries |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1592178A1 (en) * | 1967-03-10 | 1970-10-22 | Tech Hochschule Otto V Guerick | Process for the production of high-purity, finely divided aluminum oxide |
| JPS5424298A (en) | 1977-07-26 | 1979-02-23 | Kato Etsurou | Method of making alumina flakes having high surface area and low bulk density |
| JPS5939365B2 (en) | 1977-09-17 | 1984-09-22 | 三井東圧化学株式会社 | Method for producing alumina hydrate |
| DE2931585A1 (en) * | 1979-08-03 | 1981-02-12 | Degussa | TEMPERATURE-STABILIZED, PYROGEN-PRODUCED ALUMINUM OXIDE MIXED OXIDE, THE METHOD FOR THE PRODUCTION AND USE THEREOF |
| US4292290A (en) * | 1980-04-16 | 1981-09-29 | Cabot Corporation | Process for the production of finely-divided metal and metalloid oxides |
| DE4009299A1 (en) * | 1989-04-19 | 1990-10-25 | Degussa | (ALPHA) ALUMINUM OXIDE AND METHOD FOR THE PRODUCTION THEREOF |
| JP2754058B2 (en) | 1989-11-13 | 1998-05-20 | 花王株式会社 | Flaky activated alumina carrier, method for producing the same, and composite pigment using the same |
| DE4035089C1 (en) * | 1990-11-05 | 1992-04-23 | Degussa Ag, 6000 Frankfurt, De | Aluminium oxide spheres for adsorbent, chromatography, catalyst etc. - with defined surface area, density, pore vol, breaking strength and narrow particles size distribution etc. |
| DE4202694C1 (en) * | 1992-01-31 | 1993-07-01 | Degussa Ag, 6000 Frankfurt, De | Silane surface-modified pyrogenic alumina, for use in toner - to increase charge stability, produced by spraying with silane mixt. free from solvent |
| DE4445205A1 (en) * | 1994-12-17 | 1996-06-20 | Degussa | Zirconia powder, process for its preparation and use |
| US5607806A (en) * | 1994-12-28 | 1997-03-04 | Canon Kabushiki Kaisha | Toner with organically treated alumina for developing electrostatic image |
| DE19615111A1 (en) * | 1996-04-17 | 1997-10-23 | Degussa | Oxides |
-
1999
- 1999-09-10 DE DE19943291A patent/DE19943291A1/en not_active Ceased
-
2000
- 2000-07-13 ES ES00115181T patent/ES2170743T3/en not_active Expired - Lifetime
- 2000-07-13 EP EP00115181A patent/EP1083151B1/en not_active Expired - Lifetime
- 2000-07-13 AT AT00115181T patent/ATE212320T1/en not_active IP Right Cessation
- 2000-07-13 DE DE50000102T patent/DE50000102D1/en not_active Expired - Lifetime
- 2000-07-13 DK DK00115181T patent/DK1083151T3/en active
- 2000-09-04 TW TW089118065A patent/TWI232205B/en not_active IP Right Cessation
- 2000-09-07 JP JP2000272066A patent/JP3529712B2/en not_active Expired - Fee Related
- 2000-09-07 US US09/656,736 patent/US6680109B1/en not_active Expired - Lifetime
- 2000-09-07 CA CA002317692A patent/CA2317692A1/en not_active Abandoned
- 2000-09-07 IL IL13831500A patent/IL138315A0/en unknown
- 2000-09-07 CN CN00124373A patent/CN1287974A/en active Pending
- 2000-09-08 NO NO20004483A patent/NO321445B1/en not_active IP Right Cessation
- 2000-09-08 BR BR0004058-4A patent/BR0004058A/en not_active Application Discontinuation
- 2000-09-08 PL PL00342441A patent/PL342441A1/en unknown
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7572854B2 (en) | 2001-10-25 | 2009-08-11 | Degussa Ag | Dispersion of aluminium oxide |
| US7985792B2 (en) | 2001-10-25 | 2011-07-26 | Evonik Degussa Gmbh | Dispersion of aluminium oxide |
| US8241594B2 (en) | 2007-05-21 | 2012-08-14 | Orbite Aluminae Inc. | Processes for extracting aluminum and iron from aluminous ores |
| US8337789B2 (en) | 2007-05-21 | 2012-12-25 | Orsite Aluminae Inc. | Processes for extracting aluminum from aluminous ores |
| US8597600B2 (en) | 2007-05-21 | 2013-12-03 | Orbite Aluminae Inc. | Processes for extracting aluminum from aluminous ores |
| US9260767B2 (en) | 2011-03-18 | 2016-02-16 | Orbite Technologies Inc. | Processes for recovering rare earth elements from aluminum-bearing materials |
| US9945009B2 (en) | 2011-03-18 | 2018-04-17 | Orbite Technologies Inc. | Processes for recovering rare earth elements from aluminum-bearing materials |
| US9410227B2 (en) | 2011-05-04 | 2016-08-09 | Orbite Technologies Inc. | Processes for recovering rare earth elements from various ores |
| US9150428B2 (en) | 2011-06-03 | 2015-10-06 | Orbite Aluminae Inc. | Methods for separating iron ions from aluminum ions |
| US9382600B2 (en) | 2011-09-16 | 2016-07-05 | Orbite Technologies Inc. | Processes for preparing alumina and various other products |
| US10174402B2 (en) | 2011-09-16 | 2019-01-08 | Orbite Technologies Inc. | Processes for preparing alumina and various other products |
| US9023301B2 (en) | 2012-01-10 | 2015-05-05 | Orbite Aluminae Inc. | Processes for treating red mud |
| US9556500B2 (en) | 2012-01-10 | 2017-01-31 | Orbite Technologies Inc. | Processes for treating red mud |
| US9181603B2 (en) | 2012-03-29 | 2015-11-10 | Orbite Technologies Inc. | Processes for treating fly ashes |
| US9290828B2 (en) | 2012-07-12 | 2016-03-22 | Orbite Technologies Inc. | Processes for preparing titanium oxide and various other products |
| US9353425B2 (en) | 2012-09-26 | 2016-05-31 | Orbite Technologies Inc. | Processes for preparing alumina and magnesium chloride by HCl leaching of various materials |
| US9534274B2 (en) | 2012-11-14 | 2017-01-03 | Orbite Technologies Inc. | Methods for purifying aluminium ions |
Also Published As
| Publication number | Publication date |
|---|---|
| DE50000102D1 (en) | 2002-03-14 |
| BR0004058A (en) | 2001-04-17 |
| DE19943291A1 (en) | 2001-03-15 |
| EP1083151B1 (en) | 2002-01-23 |
| TWI232205B (en) | 2005-05-11 |
| PL342441A1 (en) | 2001-03-12 |
| ATE212320T1 (en) | 2002-02-15 |
| ES2170743T3 (en) | 2002-08-16 |
| EP1083151A1 (en) | 2001-03-14 |
| IL138315A0 (en) | 2001-10-31 |
| JP2001146419A (en) | 2001-05-29 |
| JP3529712B2 (en) | 2004-05-24 |
| NO20004483L (en) | 2001-03-12 |
| CN1287974A (en) | 2001-03-21 |
| DK1083151T3 (en) | 2002-05-06 |
| NO20004483D0 (en) | 2000-09-08 |
| NO321445B1 (en) | 2006-05-08 |
| US6680109B1 (en) | 2004-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6680109B1 (en) | Pyrogenically produced aluminum oxide | |
| JP4141386B2 (en) | Aluminum oxide dispersion | |
| US5013603A (en) | Ink jet recording paper with amorphous silica filler | |
| US6632489B1 (en) | Moniliform silica sol, process for producing the same, and ink-jet recording medium | |
| JPH0460434B2 (en) | ||
| JPS59185690A (en) | Ink jet recording paper | |
| CA2305526A1 (en) | Printing medium comprised of porous medium | |
| JPH0156680B2 (en) | ||
| CA2480411A1 (en) | Composite sol, process for producing the same, and ink-jet recording medium | |
| CA2343831C (en) | Dispersions | |
| US20030095905A1 (en) | Pyrogenically produced aluminum-silicon mixed oxides | |
| JPS63306074A (en) | Filler for ink jet recording sheet | |
| JP3797796B2 (en) | Recording sheet with ink receiving layer and coating liquid for forming ink receiving layer | |
| JPH11322325A (en) | Silica composite particle and its production, and ink jet recording sheet | |
| JP3784183B2 (en) | Ink-jet recording sheet with ink-receiving layer and coating liquid for forming ink-receiving layer | |
| JP4326096B2 (en) | Method for producing silica-alumina composite sol | |
| JP4397506B2 (en) | Glossy recording sheet | |
| JP4331112B2 (en) | Recording sheet with ink receiving layer and coating liquid for forming ink receiving layer | |
| JP3898495B2 (en) | Ink-receiving layer forming coating liquid and recording sheet with ink-receiving layer | |
| JP3898494B2 (en) | Ink-receiving layer forming coating liquid and recording sheet with ink-receiving layer | |
| JP2009040629A (en) | Porous silica sol, coating liquid for forming highly chromogenic ink reception layer and its use | |
| JP2621096B2 (en) | recoding media | |
| JPH0564953A (en) | Filler for ink jet recording paper | |
| JP2008213488A (en) | Recording sheet with glossy film | |
| JP2002059639A (en) | Recording sheet with glossy film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |